Ultrasonic thickness gauge with probe in stable contact with workpiece

The invention relates to the technical field of ultrasonic vehicle thickness gauges and discloses an ultrasonic thickness gauge with a probe in stable contact with a workpiece. The thickness gauge comprises a thickness gauge body, a movable connecting sleeve is clamped to the top of the thickness gauge body, a detection wire is fixedly connected to the upper end of the movable connecting sleeve, an anti-folding head is connected to the end, away from the movable connecting sleeve, of the detection wire, a detection head shell is fixedly connected to the lower end of the anti-folding head, anda clamping block is fixedly connected to the outer surface of the detection head shell. The probe is an ultrasonic thickness gauge which is in stable contact with a workpiece. A detection head shell is additionally arranged outside a detection head; the detection head shell is connected to the interior of the probe protective sleeve; meanwhile, the fixing ring is arranged in the probe protection sleeve, the sucker is in t